摘要
采用硝酸银(AgNO 3)和4,4′-二氨基二苯醚(ODA)对碳纳米管进行功能化改性,制备银修饰的氨基化碳纳米管(MWCNTs-ODA/Ag)。ODA和均苯四甲酸二酐(PMDA)为聚酰亚胺(PI)单体,MWCNTs-ODA/Ag作为纳米填料,经过原位聚合、涂膜和热亚胺化,得到MWCNTs-ODA/Ag/PI复合薄膜。分析不同纳米填料含量对复合薄膜性能的影响,结果表明:当MWCNTs-ODA/Ag的添加量为3%(质量分数,下同)时,Ag/PI-3%薄膜的拉伸强度为123.0 MPa,相比Ag/PI-0%薄膜提升了17.9%;导热系数达到0.55 W·m^(-1)·K^(-1),为Ag/PI-0%薄膜的5倍,复合薄膜导热性能得到很大提高,同时兼具优异的力学性能和耐热性能。
Silver modified aminated carbon nanotubes(MWCNTs-ODA/Ag)were prepared by functionalizing carbon nanotubes with silver nitrate(AgNO 3)and 4,4′-diaminodiphenyl ether(ODA).After in-situ polymerization,coating and thermal amination,MWCNTs-ODA/Ag/PI composite films were obtained by using ODA and pyromellitic dianhydride(PMDA)as polyimide(PI)monomers and MWCNTs-ODA/Ag as nano fillers.The effects of different nano filler contents on properties of the composite films were analyzed.The results show that when the addition amount of MWCNTs-ODA/Ag is 3%(mass fraction,the same below),the tensile strength of Ag/PI-3%film is 123.0 MPa,which is 17.9%higher than Ag/PI-0%film.The thermal conductivity reaches 0.55 W·m^(-1)·K^(-1),which is 5 times that of Ag/PI-0%film.The thermal conductivity of the composite film is greatly improved with excellent mechanical properties and heat resistance.
作者
储娜
李彦明
骆春佳
李柳新
詹景超
晁敏
CHU Na;LI Yanming;LUO Chunjia;LI Liuxin;ZHAN Jingchao;CHAO Min(School of Materials Science and Engineering,Chang’an University,Xi’an 710064,China;Northwest Industries Group Co.,Ltd.,Xi’an 710299,China;Jiangsu Aosheng Composite Materials Hi-Tech Co.,Ltd.,Suzhou 2152221,Jiangsu,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2023年第6期75-82,共8页
Journal of Materials Engineering
基金
国家自然科学基金项目(22005039)
中国博士后科学基金(2020M683395)
2022年大学生创新创业训练计划项目(G202010710086,S202210710263)
陕西省重点研发项目(2022GY-403,2021GY-199,2020ZDLGY13-08)
西安市科技创新人才服务企业项目(2020KJRC0127)
长安大学中央高校基础科研业务费专项资金(300102312403)。
关键词
聚酰亚胺
碳纳米管
导热系数
复合薄膜
polyimide
carbon nanotube
thermal conductivity
composite film
作者简介
通讯作者:晁敏(1986—),女,副教授,博士,研究方向为树脂基复合材料和先进纳米功能材料的设计与制备,联系地址:陕西省西安市雁塔区小寨路街道长安中路161号长安大学小寨校区(710064),E-mail:chaominchd@163.com。
